San Francisco 49ers cornerback Chris Culliver (29) and Eric Reid (35) celebrate after New York Giants tight end Larry Donnell (84) drops the ball in the end zone during the second half of an NFL football game Sunday, Nov. 16, 2014, in East Rutherford, N.J. (AP Photo/Bill Kostroun)
(The Associated Press)

The San Francisco 49ers have activated nose tackle Glenn Dorsey following his 21-day evaluation window, putting him in position to play for the first time Sunday against Washington if he's deemed ready.

Dorsey tore his left biceps Aug. 1 and required surgery. He was placed on the injured reserve/designated to return list with the hopes he would be able to come back this season.

San Francisco cleared room on the 53-man roster by placing nose tackle Ian Williams on season-ending IR because of a fractured left fibula suffered at New Orleans on Nov. 9. He was sidelined last year following a Week 2 ankle injury against Seattle that required several procedures. Williams was in a walking boot and using crutches last week.